Quantinuum Inc Class A Common Stock (QNT) had the highest return on August 12 by a mid-cap US stock, returning 20.3%.

ASSET	DATE	% RETURN
Quantinuum Inc Class A Common Stock (QNT)	8/12/2026	20.27%
Octave Intelligence (OCTV)	8/12/2026	14.53%
Marex Group plc Ordinary Shares (MRX)	8/12/2026	13.63%
Abcellera Biologics (ABCL)	8/12/2026	12.31%
Immunome (IMNM)	8/12/2026	10.94%
Beta Technologies (BETA)	8/12/2026	10.09%
Ionic Digital Inc Class A Common Stock (IOND)	8/12/2026	10.02%
Accelerant (ARX)	8/12/2026	9.58%
Shift4 Payments (FOUR)	8/12/2026	8.36%
Rumble (RUM)	8/12/2026	8.17%
Pharvaris (PHVS)	8/12/2026	7.14%
Madison Square Garden Entertainment (MSGE)	8/12/2026	7.03%
ServiceTitan, Inc Class A Common Stock (TTAN)	8/12/2026	6.84%
EZCORP (EZPW)	8/12/2026	6.56%
Figure Technology Solutions, Inc Class A Common Stock (FIGR)	8/12/2026	6.45%
AMC Entertainment (AMC)	8/12/2026	6.3%
Sphere Entertainment (SPHR)	8/12/2026	6.26%
Lifestance Health (LFST)	8/12/2026	5.8%
Haemonetics (HAE)	8/12/2026	5.74%
Sonos (SONO)	8/12/2026	5.7%
MiniMed Group, Inc Common Stock (MMED)	8/12/2026	5.61%
Delek US Energy (DK)	8/12/2026	5.53%
Polibeli Group Ltd Class A Ordinary Shares (PLBL)	8/12/2026	5.52%
Concentra Group Holdings Parent (CON)	8/12/2026	5.5%
Columbia Financial (CLBK)	8/12/2026	5.43%

Mid-cap stocks are treated as having a market cap between $2B and $10B.